Color-lakes and process of making same.



s'rarns PATENT ornrcn.

' OTTO STAGHLIN AND KARL ZECH ENTMAYER, OF HiiCHST-ON-THE-MAIN, GERMANY,

. ASSIGNORS TO FARBWERKE'VORM. MEISTERLUCIUS & BR'UNING, OF Hi CHST-ON- No Drawing.

ing-painting and limecolors.

tinguished by their bright greenish-blue tint,"

THE-MAIN, GERMANY, A com on'a'rron or GERMANY.

COLOR-LAKES AND PROCESS OF MAKING SAME.

I Specification of Letters Patent. I

are obtained which, when precipitated by.

methods well known in the preparation of thisclass of colors, for instance'wit-h the aid of alkaline-earth salts or aluminum-salts, yield valuable color-lakes. These lakes are suitable for coloring wall-paper and other stained paper and can also be used as print- They are distheir great fastness to water, acids, alkalis, alcohol, lime and-oil, and chiefly by their excellent fastness to light.

The following are examples of how the said color-lakes can be prepared:

Example I: There are mixed: kg. of sul-' fate of aluminum 18%, dissolved in liters of Water; 30 kg. of sulfate of baryta (heavy spar) 2 kg. of calcined soda, dissolved in 20 liters of Water; 3 kg. of the ferric compound of 1.2-naphthylenediamin 5- or 3 sulfonic acid, dissolved in 300 liters ofwater; 9 kg. of crystallized barium chlorid, dissolved in liters of water. j The color lake thus produced is pressed off and used either in this state as a dried.

Example II; There are consecutively mixed: 10 kgr. of sulfate of aluminum 18%, dissolved in liters of water; 5 kgr. of

paste, "or. after it has been calcined soda, dissolved in 50 liters of water;

10' kgrrof sulfate of ,baryta (heavy spar) 3 kg. of the ferric compound of 1.2-naphthylenediamin 5- or 3 sulfonic acid, dissolved in 250 liters of water; 18 kgr. of crystallized barium chlorid, dissolved in liters .of water. 1 The color-lake thus produced is filtered .011 and used either in this state as a paste, or after it hasbeen dried.

what we claim is:

Patented J uly9, 1912. Application filed July 25, 1910. Serial No. 573,707. I

50 Having now described our invention,

1. As new products, color-lakes comprising those salts of the ferric compounds of 1.Q-naphthylenediamin-sulfonic acids which are insoluble in water, said color-lakes being 'tint, insoluble in water, oil and alcohol and fast to acids, -alkalis, lime and light.

In testimony whereof, we aflix oursignatures in presence of two witnesses.

OTTO STACHLIN. KARL ZECHENTMAYER.

W1tnesses: I V

JEAN GRUND, CARL GRUND. 

